import java.util.Locale;
import java.util.Scanner;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: mirac
 * Date: 2025-07-24
 * Time: 17:19
 */
public class Main_1 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        while (scanner.hasNext()) {
            String a = scanner.next();
            String b = a.toLowerCase(Locale.ROOT);
            System.out.println(b);
        }
    }
}
